Why this does not set dirty for all decoding cases? On 9/25/19, Michael Niedermayer <mich...@niedermayer.cc> wrote: > This avoids unneeded operations and makes the code faster. > > Fixes: Timeout > Fixes: > 15724/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PAF_VIDEO_fuzzer-5750842205929472 > (12sec -> 9sec) > Fixes: > 17625/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PAF_VIDEO_fuzzer-5640515311108096 > (16sec -> 4sec) > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavcodec/pafvideo.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/libavcodec/pafvideo.c b/libavcodec/pafvideo.c > index 6b4771cbce..07fa05caf8 100644 > --- a/libavcodec/pafvideo.c > +++ b/libavcodec/pafvideo.c > @@ -55,6 +55,7 @@ typedef struct PAFVideoDecContext { > > int current_frame; > uint8_t *frame[4]; > + int dirty[4]; > int frame_size; > int video_size; > > @@ -187,6 +188,7 @@ static int decode_0(PAFVideoDecContext *c, uint8_t *pkt, > uint8_t code) > j = bytestream2_get_le16(&c->gb) + offset; > if (bytestream2_get_bytes_left(&c->gb) < (j - offset) * 16) > return AVERROR_INVALIDDATA; > + c->dirty[page] = 1; > do { > offset++; > if (dst + 3 * c->width + 4 > dend) > @@ -329,9 +331,13 @@ static int paf_video_decode(AVCodecContext *avctx, void > *data, > c->pic->palette_has_changed = 1; > } > > + c->dirty[c->current_frame] = 1; > if (code & 0x20) > - for (i = 0; i < 4; i++) > - memset(c->frame[i], 0, c->frame_size); > + for (i = 0; i < 4; i++) { > + if (c->dirty[i]) > + memset(c->frame[i], 0, c->frame_size); > + c->dirty[i] = 0; > + } > > switch (code & 0x0F) { > case 0: > -- > 2.23.0 > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
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